Re: [Help-smalltalk] ANSI Escape Codes

[Paolo Bonzini]

Il 08/07/2014 23:02, Ryland Taylor-Almanza ha scritto:
> Looks like it works! Thanks Paolo! I don't really understand what
> that's doing, though. Do you have any resources you could link that
> explain what that whole (<string> % #($<16r1B>)) bit does?

"%" is just a so called "interpolation" operator.  It looks for 
sequences that look like %number and replaces them with elements from 
the array on the right of the %.

In this case the array has one element and that element is a character 
with ASCII code 1B (in hexadecimal).

So the %1 in "%1[31mHi" is replaced with the escape character and printed.

Paolo

> On Tue, Jul 8, 2014 at 12:58 PM, Paolo Bonzini <address@hidden> wrote:
> > Il 08/07/2014 19:58, Ryland Taylor-Almanza ha scritto:
> >
> > > Looks like I'm running 3.2.5, which came from my system's repos. Is it
> > > recommended that I use the 3.3 alpha?
> >
> >
> > No, my mistake---it's just
> >
> >  ('%1[31mHi' % #($<16r1B>)) displayNl.
> >
> > with an uppercase B.
> >
> > Paolo
> >
> >
> > > On Tue, Jul 8, 2014 at 10:26 AM, Paolo Bonzini <address@hidden> wrote:
> > > > Il 08/07/2014 18:29, Ryland Taylor-Almanza ha scritto:
> > > >
> > > > > This seems to be giving me the following error.
> > > > >
> > > > > stdin:1: parse error, expected '>'
> > > >
> > > >
> > > >
> > > > You're probably using an older version of GNU Smalltalk.  What version
> > > > are
> > > > you running on ("Smalltalk version" will tell you).
> > > >
> > > > Paolo
> > > >
> > > >
> > > > > My apologies if I'm missing something. I'm a bit new to smalltalk
> > > > >
> > > > > On Tue, Jul 8, 2014 at 1:13 AM, Paolo Bonzini <address@hidden> wrote:
> > > > > > Il 08/07/2014 02:50, Ryland Taylor-Almanza ha scritto:
> > > > > >
> > > > > > > I'm trying to make a console-based program that makes use of ANSI
> > > > > > > escape codes. I can't seem to figure out how to go about printing a
> > > > > > > string object formatted with ANSI escape codes. I've tried the
> > > > > > > following.
> > > > > > >
> > > > > > > '\x1b[31mHi' displayNl
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > You can use formatted strings to put the Escape character in place:
> > > > > >
> > > > > > ('%1[31mHi' % #($<16r1b>)) displayNl.
> > > > > >
> > > > > > Paolo
> > > > > >
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> > > > >
> > > > >
> > > > >
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